Patrick B. answered • 05/04/19
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A = pi * R^2
dA/dt = 2 * pi * R * dR/dt
= 2 * pi * 9 * 3/2
= 27*pi
Bal M.
asked • 05/04/19AP Calculus AB Pratice Exam Help
AT the instant that the first circle has a radius of 9 centimeters, the radius is increasing at a rate of 3/2 centimeters per second. Find the rate at which the area of the circel is changing at that instant.
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